diff --git a/app/build.gradle b/app/build.gradle
index 02f66864..b236582d 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -35,6 +35,7 @@ android {
     buildTypes {
         release {
             minifyEnabled true
+            shrinkResources true
             signingConfig signingConfigs.release
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
new file mode 100644
index 00000000..97ae6e8f
--- /dev/null
+++ b/app/proguard-rules.pro
@@ -0,0 +1,12 @@
+
+# Simple XML
+-keep public class org.simpleframework.** { *; }
+-keep class org.simpleframework.xml.** { *; }
+-keep class org.simpleframework.xml.core.** { *; }
+-keep class org.simpleframework.xml.util.** { *; }
+
+-keepattributes ElementList, Root, InnerClasses, LineNumberTable
+
+-keepclasseswithmembers class * {
+    @org.simpleframework.xml.* <fields>;
+}